Image for a portion of a display screen



FIG. 1 is a front view of an image for a portion of a display screen showing a first embodiment of our new design; and,

FIG. 2 is a front view of an image for a portion of a display screen showing a second embodiment of our new design.

The broken line showing the display screen is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an image for a portion of a display screen, as shown and described. 